Destruction Of PCBs In Transformer
Oil By An E-beam
Author(s)
I. H. Jung, Y. J. Mah & M. J. Lee
Abstract
Transformer oil contaminated with 74 ppm of PCBs was decomposed by an
electron accelerator of 1.5 MeV energy, 50 mA beam current, and 75 kW power.
Sample oil contaminated with PCBs was obtained from the transformer
commercially used for more than 30 years and stocked in an electric power
company in Korea for treatment. Irradiation was carried out at normal temperature
and pressure without any pre-treatment and any additives. Physical and electrical
properties were maintained after irradiation. It seems to be clear that the
concentration of the PCBs decreased with increasing dose of irradiation. No peak
of PCBs was observed at the dose of 200 kGy. Electron beam degradation of PCBs
can be a useful tool for treatment of the PCBs contaminated transformer oil.
Keywords: PCBs, decomposition, waste treatment, electron accelerator, electron
beam.
1 Introduction
Polychlorinated biphenyls (PCBs) were commercially produced from the 1920s
as complex mixtures containing multiple isomers at different degrees of
chlorination for a variety of applications, including dielectric fluids for
capacitors and transformers, heat transfer fluids, hydraulic fluids, lubricating and
cutting oils, and as additives in pesticides, paints, carbonless copy paper,
adhesives, sealants, and plastics. They are highly chemically stable and resist
microbial, photochemical, chemical, and thermal degradation. They are
physically stable with very low vapor pressures and water solubility.
PCBs have entered the environment through both use and disposal. Since
PCBs do not readily degrade in the environment and are lipophilic, they persist
Keywords
PCBs, decomposition, waste treatment, electron accelerator, electron
beam.
Related Book
Other papers in this volume
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